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Dar al-Magana (Clockhouse of Fes)

The Dar al-Magana was the clock of Fes, a weight powered water clock built in the middle of the 14th Century which worked using a system of 13 brass bowls on platforms that filled with water at a regular pace marking the time. Each bowl had a corresponding door that opened, supposedly one an hour, which was how the people of Fes told the time.